NISSAN 300ZX 1984 Z31 Automatic Transmission Owner's Guide

INSPECTION
a Inspect drum support bushing and ring groove
areas for wear.
SAT542 I
a Inspect O.D. cancel valve & spring and all
internal surfaces for damage visible wear
No of Freelength Outer
Valve spring
coil dia active coil mm (in) mm (In) mm (in)
Wire dia
0 65 4 95 23 0
(0 0256) (0 1949) (0 9061 12 8 0 D. canel valve
Measure clearance between seal ring and ring
groove
Standard clearance:
Wear limit:
0.05 - 0.20 rnrn (0.0020 - 0.0079 in)
0.20 mm (0.0079 in)
Installed
Length Load
mm (in) N (kg, Ib)
16 0 12 26
(0 630) (1 25, 2 76)
IIII I I II
SAT545
AT-31

REPAIR FOR COMPONENT PARTS
Drum Support (Cont'd)
ASSEMBLY
1 Install 0 D cancel valve and spring into drum
suppon, then tap new retaining pins
2. Install lubrication plug in drum support
! Lubrication plug Iflbed
3. Install oneway plug in O.D. case.
One-way plug Steel ball

':
Oneway plug
4M int oil pum
spacer
assembly in Tool and suitable
[Thickness 20 mm IO 79 In SAT540
AT-32

REPAIR FOR COMPONENT PARTS
Drum Support (Cont'd)
5 Mount 0 D. case, drum support and gasket in
oil pump assembly Temporarily assemble
drum support.
Ensure O.D. case is inserted properly into oil pump
assembly.
0 0 case
I pump cafe 11 An
011 pump centering
SAT547
6. Insert an approx. 110 mm (4.33 in) bar into
bore in oil pump
at shaft location and install
intermediate shaft onto
it.
intermediate shaft
011 pump centering
tool lST25580001)
Suitablebar [llOmm
SAT599 20 mm IO 79 dl
This operation can also be performed by using
Tool
(533909)
7 Set the drum support within the run-out of the
specified total indicator reading
Total indicator reading:
Less than 0 05 mm (0.0020 in)
8 Tighten drum support securing bolts to the
specified torque.
Recheck run-out.
AT-33

REPAIR FOR COMPONENT PARTS
Control Valve Body
Upper body ride
Pressure regulator sleeve
Pressure regulator PlYg
Pressure regulator valve
Control valve upper body
Second
2nd-3rd shift Plug
Manual t
'v%! rVacuurn throttle valve
(@ ,-3rd4th shift valve -
3rd4th shift sleeve Pressure modifier WlYe
ate "6"
69
G
Throttle back-up valve
lrt3nd shift valve
2nd-3rd shift wlve
Side plate "A"
W
Lower body ride
3rd-2nd timing valve/
rControl valve lower body
&Retaining pin
SAT724
AT-34

REPAIR FOR COMPONENT PARTS
Control Valve Body (Cont'd)
I
@ Second lock valve
VALVE BODY SPRING CHART
055(00217) 555(021851 16 33 5 (1 319) 21 0 (0 827) 5 88 (0 60,1.32)
Free length
check
valve VG30E turbo 1 0 (0 0391 6 5 (0 256) 13 24 9 (0 980)
Outer
19 0 (0 748) 27 95 (2 85,6 28)
Numbers stamped on valve springs listed in table
~ below are the Same as those in the figure on the
previous page.
Orifice check valve
Servo orifice check
valve
3rd - 4th VG30E
@ shift
VG30E turbo
I nsta I led Outer coil
mm (in)
Wire dia No of Free length
Valve spring dia active
coil mm (in) Length mm (in)
mm (in) N (kg. Ib)
023 (00091) 50 (0 197) 12
0 8 (0 031) 6 6 (0260) 12 6
0 75 (0 0295) 6 1 (0 240) 13 6
-
Solenoid downshift 10 55 (0 0217) 15 55 (0 2185) I 12 @ valve
155(0610)
22 0 (0 866) 12 5 (0 492) 5 88 (0 60,l 32) I
11 5(04531 OlO(OOl.002)
30 3 (1 193)
I VG30E 1 09 (0035) 1 65(0256) I 14 relief
24 586
13 1 (0 516) (2 507, 528)
26 8 (1 055) 19 0 (0 748) 21 48 (2 19,4 83)
3rd - 2nd
valve
@ timing
VG30E 0 7 (0 028) 5 9 (0 232) 12 5 227(0894) 14.5(0571) 11 08(1.13,249)
VG30E turbo 0 9 (0 035) 7 4 (0 291) 9 207(0815) 14.5(0571) l648(1 68,370)
268(1055) I131 (0516) I 2138(218.481)
AT-35

REPAIR FOR COMPONENT PARTS
Control Valve Body (Cont'd)
DISASSEMBLY
1. Remove oil Strainer.
SAT564
2. Separate lower body, separator plate and upper
body.
Be careful not to scatter or lose orifice check valve,
servo orifice check valve, or throttle relief check
valve (ball)
and related spring.
AT168
INSPECTION
A newly manufactured valve body represents
precision manufactured valves assembled with close
tolerances into precision bores of the valve body
If inspection reveals excessive clearances, 0.03 mm
(0 0012 in) or more, between the valves and the
valve body bores, replace the entire valve body
rather than attempt rework
If one or more valves are sticking from varnish
deposits or burns resulting from deteriorated oil or
overheating, you may be able to clean the valves
and valve bodies. Always use crocus cloth, which is
a very fine type of cutting material Never use
emery cloth,
as it is too coarse and can scratch the
valves or valve bores Scratches can lead to future
deposits of varnish or foreign matter
During cleaning, do not remove the sharp edges of
the valve When
edges are rounded or scratched,
entry
is provided for dirt or foreign matter to work
into the sides
of the valves and hinder valve move-
ment
The valves may be cleaned using alcohol or lacquer
thinner The valve bodies can be dip cleaned with
a good carburetor cleaner or lacquer thinner. Do
not leave valve bodies submerged in carburetor
cleaner longer than five minutes Rinse parts
thoroughly
and dry
Lubricate
all parts in clean AT F before reassem-
bly
1 Check valves for signs of burning Replace if
2 Check oil strainer for general condition.
beyond clean-up
Replace
if necessary
SATMS
AT-36

REPAIR FOR COMPONENT PARTS
Control Valve Body (Cont’d)
3 Check separator plate for scratches or damage
Replace if necessary Scratches or score marks
can cause oil to by-pass correct oil passages
and result in system malfunction
SAT046
4. Check oil passages in upper and lower valve
bodies for varnish deposits, scratches or other
damage that would impair valve movement.
Check threaded holes and related bolts and
screws for stripped threads, replace
as needed
Test valve springs for weakened load condition
Refer to Valve Body Spring Chart for spring
specifications.
5
ASSEMBLY
1 Install orifice check valves, valve springs, throt-
tle relief valve spring and steel ball in valve
body
Lower valve body
Orifice check Valve-P for 2nd-3rd rhifl .. reiea* (VG30E turbo (I a xbo only)
-oroftee check valve
Throttle relief valve,
Orifice chkk valveJ (direct clutch applies) SAT743
Upper valve body
A
Onfice check valve--@ (Front clutch applies) h
2 Assemble separator plate and upper valve body
on lower valve body, then tighten bolts.
ReaGer bolt
When installing these bolts, first be sure to install
the two reamer bolts to their original positions.
3. Install oil strainer.
AT-37

REPAIR FOR COMPONENT PARTS
Oil Distributor
INSPECTION
Inspect contacting surface of oil distributor
and ring groove areas for wear
SAT725
0 Measure clearance between seal ring and ring
groove.
Standard clearance:
Wear limit:
0.04 - 0.16 mm (0.0016 - 0.0063 in)
0.16 rnm (0.0063 in)
Clearance it- rSeal ring
_.__-
SAT726
AT-38

REPAIR FOR COMPONENT PARTS
Direct Clutch & Front Clutch
Number of return springs Front clutch . 5 Dtr~t clutch 10 Drum assembly
O-ring, 1
Layout of direct clutch plates
Dish plater
VG30E without turbo VG30E turbo
SAT727
AT-39

REPAIR FOR COMPONENT PARTS
Direct Clutch & Front Clutch (Cont'd)
DISASSEMBLY
Compress clutch springs and remove snap ring
from spring retainer using
Tool.
e For easy removal of piston from drum, mount
clutch on drum support. Use an air gun with
a
tapered rubber up to carefully apply air pres-
sure to loosen piston from drum
INSPECTION AND ASSEMBLY
1 Check clutch drive plate facing for wear or
damage.
Standard thickness:
Wear limit:
2 Check for wear on snapring, weak or broken
coil springs, and warped spring retainer.
3. Check the operation of check ball in piston
using compressed air.
1.50 - 1.65 mrn (0.0591 - 0.0650 in)
1.4 mm (0.055 in)
LAW IS blocked here
SAT553
4 Lubricate clutch drum hub and seals, and
install inner
seal and piston seal as illustrated
Be careful not to stretch seals during instal-
lation
SAT031
5. Assemble piston, being careful not to allow seal
to kink or become damaged during installation.
After installing, turn piston
by hand to ensure
that there
is no binding.
/ .----icJ SAT032
AT-40